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BEIJING, CHINA - JULY 07: Liu Yunshan, (Center) a member of the Standing Committee of the Political Bureau of the Communist Party of China, speaks during the opening ceremony of the "Great Victory and Historical Contribution" exhibition on the 78th anniversary of the Marco Polo Bridge Incident on July 7, 2015 in Beijing, China. Wanping Fortress, also known as Wanping Castle, is a place which marks the beginning of the Japanese War of Aggression Against China, which lasted until Japan's defeat by the Allies in 1945. (Photo by Lintao Zhang/Getty Images)